Adjustable tool mounting for lathes



Aug. 25, 1959 c. M. SWEET ,9

ADJUSTABLE TOOL MOUNTING FOR LATHES Filed April 22, 1957 2 Sheets-Sheet1 v INVENTOR. Corlzse MSweet mwjw I ATTORNEYS.

Aug. 25, 1959 v c. M. SWEET 2,900,704

ADJUSTABLE TOOL MOUNTING FOR LATHES Filed April 22, 1957 2 Sheets-Sheet2 l I INVENTOR. L/aily 5 7 Corlise M.5weet M XJ/M ATTORNEYS.

ADJUSTABLE TOOL MQUNTIN G FOR LATIES Corlise M. Sweet, Milwaukee, Wis.

Application April 22, 1957, Serial No. 654,248

Claims. (Cl. 29-96) This invention relates to an adjustable toolmounting for lathes and provides a means for adjusting one tool relativeto another where multiple cutting tools are employed either in tandem,as in ordinary turning or facing, or side by side as in step turning orfacing.

Heretofore, as illustrated in applicants copending application, SerialNo. 264,548, filed January 2, 1952, now abandoned, it has been proposedto provide an adjustable tool with supporting means having separatelateral and longitudinal ways of adjustment of the tool in the holder.In such instances both a lateral and a longitudinal adjustment screw isemployed for adjusting the screw.

Where it is desired to avoid the use of lateral adjusting screws aswhere a plurality of tools are to be mounted side by side, or wherethere is no member of the tool block through which a lateral adjustmentscrew may be threaded, it is desirable to provide other means forlaterally adjusting the tool.

The present invention solves this problem by providing a diagonal Waysupporting a guide block upon which the tool is supported and byadjusting the guide block along the diagonal way by an adjusting screwthreaded generally longitudinally of the tool. The lateral adjustment ofthe tool is accomplished along the diagonal way without disturbing thelongitudinal adjustment of the tool which determines the depth of cut.For this purpose the tool and its supporting guide block have matingsurfaces providing a longitudinal way, and the longitudinal position ofthe tool relative to the tool holder is determined by an adjustableabutment between the tool and holder and which generally consists of anadjustment screw extending longitudinally of the tool.

The accompanying drawings illustrate various embodiments of theinvention presently contemplated to be the best mode of carrying out theinvention.

In the drawings:

Figure 1 is a schematic outline in side elevation of a tandem tool setin side elevation;

Fig. 2 is an end elevation of the construction of Fig. 1;

Fig. 3 is a plan view of a guide block of Fig. 1;

Fig. 4 is a plan view of the supporting way for the guide block of Fig.1;

Fig. 5 is a side elevation similar to Fig. 1 of another embodiment ofthe invention;

Fig. 6 is an end elevation of the construction of Fig. 5;

Fig. 7 is a plan view of a guide block of Fig. 5;

Fig. 8 is a plan view of the supporting way for the guide blocks of Fig.5; and

Fig. 9 is a top plan view of a tool holder showing a step turningoperation.

In the construction of Figs. 1 to 4, inclusive, a pair of cutting tools1 and 2 are separatelyclamped in corresponding individual transverserecesses 3 and 4- in the face of the tool holder 5. The upper tool 1 isclamped by means of one or more of the holddown screws 6 threadeddownwardly through the top of the holder 5 and into engagement with thetool. The lower tool 2 is clamped by means of the upwardly pressed pin 7in its shank and which is actuated into clamping engagement with theupper wall of the recess 4 by a screw 8 threaded longitudinally in thetool and having an inclined cam end 9 engaging a complemental lower endof the pin.

Each tool 1 and 2 is supported on a guide block 10 which in turn issupported on the tool holder 5. Each guide block It) has a downwardflange 11 at its outer end which carries an adjusting screw 12 threadedtherethrough and adapted to engage the front of tool holder 5.

The lower surface of each guide block 10 and the correspondingsupporting surface of the tool holder 5 are serrated diagonally asillustrated in Fig. 4, and are complemental to provide ways 13 extendingdiagonally of the tool to provide for lateral adjustment of the tool inthe holder by turning of the adjusting screw 12.

The engaging surfaces of each guide block 10 and the tool carriedthereby are serrated longitudinally of the tool, as illustrated in Fig.3, to provide longitudinal ways 14 for adjustment of the correspondingtool longitudinally to determine the depth of cut. Adjustment of thetool on ways 14 is effected by an adjusting screw 15 threadedlongitudinally through the tool and into abutment with the face of thetool holder 5.

As indicated in Fig. 2, the recesses 3 and 4 extend across the face ofthe tool holder 5 and provide locating the tools 1 and 2 either intandem, or spaced laterally apart to provide for step turning. Ifdesired, several tools may be disposed side by side in each recess.

This construction also provides for overlapping of the tools wherebystep turning and chamfering may be provided with cuts spaced less thanthe width of a tool without interference between the tools.

Figs. 5 to 8 illustrate a mounting providing several tools 16, 17 and 18mounted in a single recess 19 extending across the face of tool holder26. In this construction each tool is clamped between an upper guideblock 21 and a lower guide block 22 by means of a holddown screw 23threaded downwardly through the top of tool holder 20 and intoengagement with the upper guide block.

Each tool is held against lateral displacement relative to its guideblocks 21 and 22 as by longitudinal flanges 24 on the guide blocksillustrated for tool 16 or by longitudinal serrations 25 on theinterface between the tool and the guide blocks illustrated for tools 17and 18. In either construction a longitudinal way is provided for freelongitudinal movement of the tool relative to the guide blocks.

The upper guide block 21, in each instance, is provided with a shoulderor abutment 26 adapted to engage the outer end of the tool shank to holdthe tool against the work. Adjustment of the upper guide block 21 in andout by means of the adjustment screw 27 threaded there through and intoengagement with the tool holder 26 at the back of recess 19, determinesthe depth of cut for the tool.

The lower guide block 22 is supported on the tool holder 2t} at thebottom of recess 19 by a diagonal way 28 provided by complemental matingserrations extending diagonally of the meeting surfaces of the guideblock and tool holder. A screw 29 is threaded longitudinally through thelower guide block 22 and into abutment with tool holder 20 at the backof recess 19 to provide for adjustment of block 22 along the Way 28.

The tools 16, 17 and 18 may be placed as close to each other or as farapart as may be desirable. A fine adjustment of the relative position ofthe tools is effected by the screws 29.

In all cases, since the tool is free to retract until its abutment screw15 or 27 stops it and determines the depth of cut, lateral adjustment ofthe tool and its guide block 10 or guide blocks 21 and 22 will not alterthe depth of cut or require a new adjustment therefor. The

tools can be disposed close to one another without interference bylateral adjustment means.

Since both the longitudinal or depth of cut adjustment and the lateraladjustment of the tool is made by a corresponding longitudinallyextending screw abutment, the back pressure on the tool from thecuttingaction retains both the tool and the guide block in a position of tightengagement of the abutmentsat all times. For this purpose, where thefeed of the tool is substantially at an angle to the depth of cut, it isdesirable to have the diagonal ways extend toward the workpiece in thegeneral direction of feed, as shown in Fig. 9.

Where infinite lateral adjustment of the tool is not needed, it ispossible to utilize an adjustment by increments corresponding to thepitch of the diagonal serrations of way 13 or 28. For this purpose theadjusting screws 12 and 29 might be eliminated. If it be desired toobtain a finer increment adjustment than the pitch of the serrations ofways 13 and 28, it is possible to provide a finer pitch for thecorresponding serrations of the longitudinal way 14 or the serrations25, as the case may be. In this way a finer increment adjustment equalto one half the pitch of the serrations may be provided without reducingthe pitch or size of the serrations by moving the guide block oneserration in one direction and the tool one serration in the oppositedirection.

Various embodiments of the invention may be employed within the scope ofthe accompanying claims which particularly point out and distinctly setforth the subject matter regarded as the invention.

I claim:

1. An adjustable tool mounting for lathes, comprising a tool holderhaving a recess therein for receiving a tool, a tool and guide blockassembly adjustably clamped in said recess, a longitudinal way betweenthe tool and guide block to provide for longitudinal adjustment of thetool and prevent relative lateral movement between the tool and guideblock, longitudinal abutment means between the tool and tool holderdetermining the depth of cut position of the tool, a diagonal waybetween the guide block and tool holder to provide for lateraladjustment of the guide block and the associated tool, and means toadjust the guide block along said diagonal way to effect lateraladjustment of the tool.

2. An adjustable tool mounting for lathes, comprising a tool holderhaving a recess therein for receiving a tool, a tool and guide blockassembly adjustably clamped in said recess, a longitudinal way betweenthe tool and guide block to provide for longitudinal adjustment of thetool and prevent relative lateral movement between the tool and guideblock, longitudinal abutment means between the tool and tool holderdetermining the depth of cut position of the tool, a diagonal waybetween the guide a 3. An adjustable tool mounting for lathes,comprising a tool holder having a recess therein for receiving a tool, atool and guide block assembly adjustably clamped in said recess, alongitudinal way between the tool and guide block to provide forlongitudinal adjustment of the tool and prevent relative lateralmovement between the tool and guide block, longitudinal abutment meansbetween the tool and tool holder determining the depth of cut positionof the tool, a diagonal way between the guide block and tool holder toprovide for lateral adjustment of the guide block and the associatedtool, and a screw abutment between'said guide block and tool holderdisposed to adjust the guide block along said diagonal way to effectlateral adjustment of the tool, said diagonal way extending in adirection toward the feed of the tool to the work.

4. An adjustable tool mounting for lathes, comprising a tool holderhaving a recess therein for receiving atool, a tool and guide blockassembly adjustably clamped in said recess, a longitudinal way betweenthe tool and guide block to provide for longitudinal adjustment of thetool and prevent relative lateral movement between the tool and guideblock, longitudinal abutment means between the tool and tool holderdetermining the depth of cut position of the tool, and a diagonal waybetween the guide block and tool holder to provide for lateraladjustment of the guide block and the associated tool, said ways beingprovided by parallel serrations disposed with the serrations of one wayof different pitch than the serrations of the other way whereby apredetermined increment adjustment is provided for the lateral positionof the tool for a given depth of cut and which is less than either pitchof the serrations.

5. An adjustable tool mounting for lathes, comprising a tool holder, aguide block supported by said holder, a tool supported on said guideblock, a grooved way between said guide block and tool holder providingfor adjustment of the block in a predetermined direction relative to theholder, a grooved way between said tool and said guide block foradjustment of the tool in a predetermined direction relative to theblock, said ways being provided by parallel interlocking serrations withthe serrations of one way of diflerent pitch than the serrations of theother way whereby a predetermined increment adjustment is providedlaterally of said serrations and which is less than either pitch of theserrations.

References Cited in the file of this patent UNITED STATES PATENTS1,626,953 Muller May 3, 1927 1,733,657 Ericson Oct. 29, 1929 1,836,472Jacobs Dec. 15, 1931 2,037,642 Scribner Apr. 14, 1936 2,408,787 LowellOct. 8, 1946 FOREIGN PATENTS 9,822 Great Britain Apr. 30, 1903 617,343Germany Aug. 16, 1935

